Front brake caliper piston milling machine fixture

Abstract

The utility model belongs to the technical field of milling machine fixtures, and particularly relates to a front brake caliper piston milling machine fixture which comprises a piston body, one end of the piston body is open, the other end of the piston body is closed, an annular groove is formed in the surface of the end close to the opening, the milling machine fixture comprises a base, a clamping piece and a limiting piece, and the base is installed on a workbench of a milling machine; the clamping piece is installed on the base and used for clamping the inner wall of the piston body. The limiting piece is installed on the base and used for being connected with the annular groove in a clamping mode and releasing the clamping mode. The limiting piece is used for replacing an operator to hold by hand and is clamped with the annular groove in the piston body, so that the mounting precision of the piston body before the clamping piece clamps the piston body is guaranteed, the clamping precision is guaranteed, and potential safety hazards are effectively eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling machine fixtures, and particularly relates to a milling machine fixture for a front brake caliper piston. Background Art

[0002] The front brake caliper piston is usually first formed into a semi-finished product by casting or forging, and then its finish machining, such as machining of the outer circle, inner hole, and annular groove (usually used for installing a dust cover), is carried out by a lathe or a milling machine. In order to improve the machining accuracy of the milling machine, the semi-finished product is usually pre-machined by a lathe and then processed by a milling machine, so as to improve the installation accuracy of the piston body by the milling machine fixture and improve the machining accuracy of the milling machine.

[0003] Traditional milling machine fixtures usually clamp the surface of the piston body, which is likely to produce imprints on the surface of the piston body and affect the product quality. For example, a caliper piston inner liner fixture disclosed in the Chinese patent application number (CN201621110592.3) previously applied by our company clamps the caliper piston by expanding the inner liner head through the inner wall of the piston body, and will not damage the surface of the piston body. Although it sets a stop seat to axially align the piston body before installation, when the inner liner head clamps the piston body, usually an operator needs to hold it by hand when the inner liner head clamps the piston body to ensure that the axis of the inner liner head coincides with the axis of the piston body, so as to improve the clamping accuracy of the inner liner head on the piston body. However, the operator's hand-held method not only has low accuracy but also has potential safety hazards and needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a milling machine fixture for a front brake caliper piston aiming at the above existing technical problems, achieving the effects of avoiding imprints on the surface of the piston body and having high clamping accuracy.

[0005] In view of this, the utility model provides a milling machine fixture for a front brake caliper piston, which includes a piston body, one end of the piston body is open and the other end is closed, and an annular groove is opened on the side close to the opening. The milling machine fixture includes:

[0006] A base, which is installed on the workbench of the milling machine;

[0007] A clamping member, which is installed on the base and is used for clamping the inner wall of the piston body;

[0008] A limiting member, which is installed on the base and is used for clamping and releasing the clamping with the annular groove.

[0009] In the above technical solution, further, the clamping member includes:

[0010] A matrix, which is connected to the base, axially provided with a through hole, and provided with a wire groove at the top to form a first clamping jaw.

[0011] The pull rod is slidably connected at the through hole, and a conical head is provided at the top for expanding the first jaw outwards;

[0012] The driving member is installed on the milling machine, and the output end is connected to the pull rod and is used to drive the pull rod to move;

[0013] The linkage member is installed in the base and is used for the linkage between the pull rod and the limiting member.

[0014] In the above technical solution, further:

[0015] A conical hole adapted to the conical head is provided at one end of the through hole.

[0016] In the above technical solution, further, the limiting member includes:

[0017] The second jaw is swingably connected in the base, and a jaw head is formed at the top for engaging and disengaging with the annular groove;

[0018] Wherein, a slot hole for the second jaw to swing is provided on the base.

[0019] In the above technical solution, further, the linkage member includes:

[0020] An annular protrusion is installed on the surface of the pull rod, and an inclined surface for abutting against the annular protrusion is provided at one end of the second jaw away from the jaw head;

[0021] A spring is installed on one side of the second jaw away from the inclined surface and is used for the reset of the second jaw;

[0022] Wherein, a counterbore for the movement of the annular protrusion is provided on the base.

[0023] In the above technical solution, further:

[0024] An installation hole for installing the spring is provided in the base, and a pressure sensor is installed in the installation hole.

[0025] In the above technical solution, further:

[0026] Rotating shafts are provided on both side surfaces of the second jaw, and the rotating shafts are connected to the base by bearings.

[0027] In the above technical solution, further:

[0028] An installation groove for installing the rotating shaft is provided in the base, and a first fixing block and a second fixing block for limiting the installation height of the rotating shaft are provided in the installation groove.

[0029] The beneficial effects of the present utility model are:

[0030] 1. Instead of being held by an operator's hand, a limiting member is used, and it is clamped with the annular groove on the piston body to ensure the installation accuracy of the piston body before the clamping member clamps the piston body, guarantee the clamping accuracy, and effectively eliminate potential safety hazards.

[0031] 2. When the driving member drives the pull rod, the linkage member links the limiting member, avoiding the addition of an extra power source and having the effect of reducing the manufacturing cost.

[0032] 3. The second jaw is swingably connected to the base, avoiding obstruction to the placement of the piston body by the second jaw. After the piston body is placed, during the process of driving the pull rod by the driving member, the annular protrusion on the surface of the pull rod will abut against the inclined surface of the second jaw, thereby pushing the second jaw into the annular groove and axially clamping the piston body to ensure the installation accuracy of the piston body. Then, under the continuous driving of the driving member, the first jaw abuts against the inner wall of the piston body to clamp the piston body, improving the clamping accuracy and guaranteeing the machining accuracy. Description of the Drawings

[0033] Figure 1 is the structural schematic diagram of the present utility model;

[0034] Figure 2 is the top view of the present utility model;

[0035] Figure 3 is the present utility model Figure 2 the cross-sectional view taken along line A-A in;

[0036] Figure 4 is the present utility model Figure 3 the enlarged view at B in;

[0037] Figure 5 is the present utility model Figure 2 the cross-sectional view taken along line C-C in;

[0038] Figure 6 is the present utility model Figure 5 the enlarged view at D in;

[0039] In the figure, the markings are represented as: 1, piston body; 2, annular groove; 3, base; 30, slot hole; 31, counterbore; 32, mounting hole; 33, mounting groove; 4, clamping member; 40, base body; 41, through hole; 42, wire groove; 43, first jaw; 44, pull rod; 45, tapered head; 46, driving member; 47, linkage member; 470, annular protrusion; 471, inclined surface; 472, spring; 48, tapered hole; 5, limiting member; 50, second jaw; 51, jaw head; 52, rotating shaft; 6, first fixing block; 7, second fixing block. Detailed Embodiment

[0040] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0041] Embodiment 1:

[0042] This embodiment provides a milling fixture for the front brake caliper piston, including a piston body 1. One end of the piston body 1 is open and the other end is closed, and an annular groove 2 is provided on the surface near the open end. The milling fixture includes:

[0043] A base 3, installed on the workbench of the milling machine;

[0044] A clamping member 4, installed on the base 3 and used to clamp the inner wall of the piston body 1;

[0045] A limiting member 5, installed on the base 3 and used for clamping and releasing clamping with the annular groove 2;

[0046] Among them, the specific structure of the milling machine is the prior art and will not be elaborated here. Moreover, this application is only applicable to pistons with an annular groove 2 provided on the surface of the open end of the piston body 1 and requiring milling processing.

[0047] It can be seen from this embodiment that the limiting member 5 is used instead of the operator's hand holding, and by clamping with the annular groove 2 on the piston body 1, the installation accuracy of the piston body 1 before the clamping member 4 clamps the piston body 1 is ensured, the clamping accuracy is guaranteed, and potential safety hazards are effectively eliminated.

[0048] Embodiment 2:

[0049] This embodiment provides a milling fixture for the front brake caliper piston. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The clamping member 4 includes:

[0050] A base body 40, connected to the base 3, axially provided with a through hole 41, and provided with a wire groove 42 at the top to form a first jaw 43.

[0051] A pull rod 44, slidably connected at the through hole 41, and a conical head 45 is provided at the top for expanding the first jaw 43 outwards;

[0052] A driving member 46, installed on the milling machine, and the output end is connected to the pull rod 44 and used to drive the pull rod 44 to move;

[0053] A linkage member 47, installed in the base 3 and used for the linkage between the pull rod 44 and the limiting member 5;

[0054] The number of the wire slots 42 may be 1 to 3, and the driving member 46 may be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder.

[0055] It can be seen from this embodiment that the linkage member 47 drives the limit member 5 while the driving member 46 drives the pull rod 44, thereby avoiding the addition of an additional power source and having the effect of reducing the manufacturing cost;

[0056] At the same time, the conical head 45 on the pull rod 44 is used to open the first clamping claw 43, thereby abutting against the inner wall of the piston body 1, thereby achieving clamping and avoiding marks on the piston surface.

[0057] Embodiment 3:

[0058] This embodiment provides a front brake caliper piston milling machine fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0059] A tapered hole 48 adapted to the tapered head 45 is formed at one end of the through hole 41 .

[0060] It can be seen from this embodiment that by opening a tapered hole 48 at one end of the through hole 41 to match the tapered head 45, the contact area between the tapered head 45 and the inner wall of the through hole 41 can be increased, thereby improving the structural stability after the first clamping jaw 43 is opened, and ensuring the stability of the piston body 1 after clamping.

[0061] Embodiment 4:

[0062] This embodiment provides a front brake caliper piston milling machine fixture, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the limiter 5 includes:

[0063] The second clamping jaw 50 is swingably connected in the base 3 and has a claw head 51 formed on the top thereof for engaging with and releasing the annular groove 2;

[0064] The base 3 is provided with a slot 30 for the second clamping jaw 50 to swing.

[0065] It can be seen from this embodiment that the second clamping jaw 50 is connected to the base 3 by swinging, so as to avoid the second clamping jaw 50 causing obstruction to the placement of the piston body 1, and after the piston body 1 is placed, the second yellow diamond is driven to swing by the linkage member 47, so that the second clamping jaw 50 is clamped into the annular groove 2, and the piston body 1 is axially clamped to ensure the installation accuracy of the piston body 1, and then under the continued driving of the driving member 46, the first clamping jaw 43 abuts against the inner wall of the piston body 1 to clamp the piston body 1, thereby improving the clamping accuracy and ensuring the processing accuracy;

[0066] The slot 30 is provided to hinder the swing of the second clamping jaw 50 .

[0067] Example 5:

[0068] This embodiment provides a milling fixture for the front brake caliper piston. In addition to the technical solutions of the above embodiments, it also has the following technical features. The linkage 47 includes:

[0069] An annular protrusion 470 is installed on the surface of the pull rod 44, and an inclined surface 471 that abuts against the annular protrusion 470 is provided at one end of the second jaw 50 away from the jaw head 51;

[0070] A spring 472 is installed on the side of the second jaw 50 away from the inclined surface 471 and is used for resetting the second jaw 50;

[0071] Wherein, a counterbore 31 for the movement of the annular protrusion 470 is formed in the base 3.

[0072] It can be seen from this embodiment that by the annular protrusion 470 abutting against the inclined surface 471 on the second jaw 50, the jaw head 51 is pushed closer to the annular groove 2 and is snapped into the annular groove 2 for engagement;

[0073] The setting of the spring 472 facilitates the reset of the second jaw 50 after the annular protrusion 470 contacts and engages with the inclined surface 471, which is convenient for taking out the piston body 1;

[0074] The inclined surface 471 facilitates the sliding of the annular protrusion 470 on the inclined surface 471 after abutting, ensuring the pushing of the second jaw 50 and thus ensuring the swinging of the second jaw 50.

[0075] Example 6:

[0076] This embodiment provides a milling fixture for the front brake caliper piston. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0077] An installation hole 32 for installing the spring 472 is formed in the base 3, and a pressure sensor is installed in the installation hole 32;

[0078] Wherein, the specific structure of the pressure sensor is a mature existing technology. Here, it is only used to detect the deformation of the spring 472, so as to judge whether the second jaw 50 is snapped into the annular groove 2. And when the pressure sensor does not detect the normal deformation of the spring 472, the milling cutter on the milling machine will not start, so as to ensure safety.

[0079] As can be seen from this embodiment, by providing the mounting holes 32, the stability of the spring 472 installation is improved. A pressure sensor is installed in the mounting holes 32 to detect different pressures, and thus the deformation of the spring 472 is detected, so as to determine whether the jaw head 51 of the second jaw 50 is caught in the annular groove 2. When the pressure sensor detects a predetermined pressure, it is determined that the jaw head 51 is caught in the annular groove 2, and only then can the milling machine be started. Moreover, if the predetermined pressure is not detected within a predetermined time, the milling machine is controlled to give an alarm, indicating that the piston body 1 is clamped, effectively improving safety.

[0080] Embodiment 7:

[0081] This embodiment provides a milling fixture for a front brake caliper piston. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0082] Rotating shafts 52 are provided on both side surfaces of the second jaw 50, and the rotating shafts 52 are connected to the base 3 by bearings.

[0083] As can be seen from this embodiment, through the bearing connection, the swing of the second jaw 50 has low frictional resistance, avoiding jamming during the swing of the second jaw 50, reducing wear, and extending the service life.

[0084] Embodiment 8:

[0085] This embodiment provides a milling fixture for a front brake caliper piston. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0086] A mounting groove 33 for installing the rotating shaft 52 is provided in the base 3, and a first fixing block 6 and a second fixing block 7 for restricting the installation height of the rotating shaft 52 are provided in the mounting groove 33.

[0087] As can be seen from this embodiment, through the arrangement of the first fixing block 6 and the second fixing block 7, different first fixing blocks 6 and second fixing blocks 7 can be selected to limit the rotating shaft 52 at different positions in the mounting groove 33, and thus the setting height of the second jaw 50 can be changed to adapt to the opening height of the annular groove 2 on different piston bodies 1, achieving applicability within a small range of differences and effectively improving the applicability.

[0088] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A front brake caliper piston milling machine fixture, comprising a piston body (1), wherein the piston body (1) has an opening at one end and a closed end, and an annular groove (2) is provided on the surface of the end close to the opening, characterized in that: Milling machine fixtures include: A base (3) mounted on a workbench of a milling machine; A clamping member (4) is mounted on the base (3) and is used to clamp the inner wall of the piston body (1); A stopper (5) is mounted on the base (3) and is used to engage with and release the annular groove (2); The clamping member (4) comprises: A base (40) is connected to the base (3), and is provided with a through hole (41) in the axial direction, and a wire groove (42) is provided at the top end to form a first clamping claw (43); A pull rod (44) is slidably connected to the through hole (41) and has a conical head (45) at the top thereof for spreading the first clamping jaw (43) outward; A driving member (46) is mounted on the milling machine, and an output end thereof is connected to the pull rod (44) and is used to drive the pull rod (44) to move; A linkage member (47) is installed in the base (3) and is used for linkage between the pull rod (44) and the limiting member (5); The limiting member (5) comprises: A second clamping claw (50) is swingably connected in the base (3), and has a claw head (51) formed at the top thereof for clamping and releasing the clamping with the annular groove (2); Wherein, a slot hole (30) for the second clamping claw (50) to swing is provided on the base (3).

2. The front brake caliper piston milling machine fixture according to claim 1, characterized in that: A tapered hole (48) adapted to the tapered head (45) is formed at one end of the through hole (41).

3. The front brake caliper piston milling machine fixture according to claim 1, characterized in that: The linkage member (47) comprises: An annular protrusion (470) is mounted on the surface of the pull rod (44), and an end of the second clamping jaw (50) away from the jaw head (51) is provided with an inclined surface (471) abutting against the annular protrusion (470); A spring (472) is mounted on a side of the second clamping jaw (50) away from the inclined surface (471) and is used for resetting the second clamping jaw (50); Wherein, a countersunk hole (31) for the annular protrusion (470) to move is provided on the base (3).

4. The front brake caliper piston milling machine fixture according to claim 1, characterized in that: The base (3) is provided with a mounting hole (32) for mounting a spring (472), and a pressure sensor is mounted in the mounting hole (32).

5. The front brake caliper piston milling machine fixture according to claim 1, characterized in that: Rotating shafts (52) are provided on two side surfaces of the second clamping jaw (50), and the rotating shafts (52) are connected to the base (3) via a bearing.

6. The front brake caliper piston milling machine fixture according to claim 5, characterized in that: The base (3) is provided with a mounting groove (33) for mounting the rotating shaft (52), and the mounting groove (33) is provided with a first fixing block (6) and a second fixing block (7) for limiting the mounting height of the rotating shaft (52).

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